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Improvement in Machine for Forming Rings, Watch Case Centers, etc.

What is Planchette ?

The Impossible in Constructive Science

Editorial Summary

Decision in a Reissue Case

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

Extension Notices

Answers to Correspondents

New Publications


Water Blowing Through Engine Cylinders

Quality of Musical Sounds

Abuse of the Franking Privilege

Modern Telegraphy

Effect of Labor-Saving Machinery Upon Wages

The Sutro Tunnel

Importance of Regular Habits

Recent Boiler Explosions

Patents and Claims

Issued by the United States Patent Office



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  • Business and Personal

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